Improvement in bending-machines



' SSheets-Sheetl. C. A. SCOTT & M. SCHULTZ.

' BENDING-MAGHINE. No.180,436. Patented Aug.1,1876;

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3SheetsSheetZ. C. A. SCOTT & M. SCHULTZ.

BENDING-MAGHINE. No.180,436.

Patented Augnl, 1876.

N.PETEHS. FHOTO-UTHOGRAPHER. WASHINGTON. D. C.

SSheets-SheetS; 0. L SCOTT & "M. SCHULTZ.

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N. PETERS. FHDTWLITHOGRAPNER. WASHINGTON. D, Q

UNITED STATns PATENT Grrroa.

CHARLES A. SCOTT AND MICHAEL SCHULTZ, OF CINCINNATI, OHIO; SAID SCHULTZASSIGNOR TO SAID SCOTT.

IMPROVEMENT IN BENDINGJ' ACHINES.

Specification forming part of Letters Patent No. 180,436, dated August1, 1876; application filed August 17, 1874.

To all whom it may concern Be it known that we, CHARLES A. Soorr and-MICHAEL SCHULTZ, of Cincinnati, Ohio, have invented an ImprovedSheet-Metal-Bending Machine, of which the following is a speci-Thisjinvention is a special machine, adapted to bend the roofing-platescovered by patent of G. A. Scott, January 20, 1784,146,555; andconsists, mainly, in certain details of construction, which will befully described hereinafter.

In the drawings, Figure 1 represents a front elevation of our improvedmachine; Figs.2 and 4, vertical sectional elevations of the same Figs.3and 6, Sheets 1 and 2, views ofthe eccentric sleeve or collar detached;Fig. 5, a front elevation of the bending-cylinders detached; Fig. 6, anexaggerated view representing the tapering form of the lowerbending-surface; Fig. 7, a perspective view of a series of plates whenbent and united to cover the roof; Fig. 8, a perspective view of theedge of a single plate properly bent; and Fig. 9, a similar sheet,showing a plate improperly bent.

To enable others skilled in the art to make and use our invention, wewill now proceed to describe fully its construction and manner ofoperation. I

A represents any suitable frame-work or table adapted to stronglysupport the machine proper which'is attached thereto. B represents thecylinder forming the lower bendingsurface, which is rigidly secured toone end of-the table, in such position that its upper surface lies inthe same plane as the table-surface, as

the ends of the fixed cylinder B, as shown in Fig. 5. 0 represents aframe consisting of the standards or arms 0 c, separated below to holdthe ends of the upper bending-cylinder, but bent together and unitedabove to form a common handle, 0 as shown in Fig. 1. 0 0 Fig. 5,representjournal-openings at the ends of the arms 0 c, which are adaptedto inclose the journals 1) b of the fixed cylinder B. c 0 representjournal-openings, in which are held the eccentric collars of the uppercylinder. 0 represents a recess in the handle, and c a transverse shaftor pin adapted to hold the handle of the catch-lever, as will behereinafter described. D D, Figs. 3, 5, and 6, represent eccentriccollars, consisting of an inner portion, 01, adapted to turn in thejournal-openings c and an outer portion, d of enlarged area, to whichthe handle F, for actuating the eccentric, is attached. d represents thejournal-bearing for one end ofthe upper cylinder, this beingv locatedupon one side-of the center of the collar, as shown. E represents thecylinder which forms the upper bending-surface, which is provided with aconvex surface corresponding with the depressed portion of the lowercylinder, and has also journals 6 0, adapted to rest in thecorresponding bearings of the eccentric collar, as shown. F represents abar properly bent to form a convenient handle, as shown, which isfastened at its ends to the outer portion d of the collar. G representsa lever, pivoted .in the recess of the handle,-which is provided at oneend with an inclined face, g, and a catch, 9 adapted to hold the bar F,as shown. g represents a spring'of suitable construction secured at oneend to the frame 0, and at the other to the handle of the catch-lever,by means of 4 which the latter is held in proper position to catch thebar when it is brought into contact with it. H represents a transversebar, united at its ends to the edges of the standards of the frame (J,in front of the opening between the bending-cylinders, as shown. sentguide-stops, consisting of square sockets k h adapted to slide freelyupon the bar, and depending arm 71. k adapted to arrest themovementofthe plateinserted between the rollers, and hold it in properposition to be acted h h repreon by them. I I represent recesses ordepressions in the bending-cylinders, by means of which they are adaptedto act upon the plates, which have already a folded edge when presentedto this machine for action.

The operation of our machine is as follows: The plates, having beenpreviously bent upon the edges in another machine, are successivelypresented to this machine for action. Aplate having been laid upon thetable, one end is inserted between the opening between the cylinders,which have been separated to permit this operation, and pushed forwarduntil its forward edge comes in contact with the guidestops, as shown inFig.2. The handle F is then raised until it is caught by the catchlever,by which means the eccentric collars are partially revolved, and theupper cylinder consequently brought down upon the lower. The frame 0 isthen brought forward, as shown in Fig. 4, by means of which action theupper cylinder is caused to pass over the lower, and by its pressuretheintermediate metal plate is caused to assume the form of thebending-surfaces. The bar F, being disengaged from its catch, is left inits depressed position, while the frame 0 is raised for the purpose ofelevating the upper bending-surface, in order that the plate may beremoved from the machine. The plate may be held from moving, whenacted-upon, by a suitable clamp upon the table.

The lower bending-surface is made tapering from end to end, as showninFig. 6, and the upper surface caused to conformthereto, in order thatthe plate, when acted upon, may be bent more at one end than the other,so that when a series is put together, as shown in Fig. 7, the adjacentends will interlock readily, the narrow end of one fitting accuratelythe wide end of the other, as shown.

This will be understood by inspecting Fig. 7, in which the lines a: a;and y 3 indicate the relative width of the upper and lower ends of theplate, the lower end of the plate, it being observed, being less inwidth just the distance necessary to enable it to fit within the bentsides of the upper end of the plate below it, the sides of each platebeing bent on a taper for the purpose, as indicated in the drawing bythe lines 2 z. The lower bending-surface is depressed, and the uppersurface caused to conform thereto, in order that the sheet may be bentmore in the middle than the ends, this excess of pressure in the centerbeing necessary to cause the sheet toassume a uniform curve throughoutits length, as shown in Fig. 8. The edges of the sheet, being double,retain their place when bent; but the central portion, being single, hasa tendency to spring backward, as shown in Fig. 9, after the pressurehas been removed, and hence the central portion requires an excess ofpressure, as described.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

l. The combination of the fixed bendingcylinder and the movablebending-cylinder, V

with the'eccentric clamping mechanism, the

movable cylinder, when actuated by the clamping mechanism, being adaptedto pass over the fixed bending-surface, substantially as described.

2. The combination of the fixed and movable bending-cylinders with theframe 0, ec-- centric collars D D, and bar F, as described.

3.-The combination of the bar F and catchdouble portion, for the purposeof securing uniformity of curvature, as described.

6. The bending-surfaces provided with recesses, as and for the purposesdescribed.

7. The tapering bending-surfaces, adapted to make the plates narrower atone end than the other, as described.

8. The bending-surfaces provided with the tapering surfaces, thedepressed and projecting portion, and the recesses, as described.

CHARLES A. SCOTT. MICHAEL SCHULTZ.

Attest:

S. H. WHrrMoRE, Gno. P. BROWN.

